Agerman scientist, used a microscope to study plant parts and concluded that all plants were made of cells. a german doctor, hypothesized that new cells form already existing cells. 3. all cells have organelles that perform specific functions. these organelles can be observed with the ise of a forms the outer boundary of the cell and allow only certain materials into and out of the cell. the cell. the genetic blueprints that control the operations of the cell in the nucleus. a. it is made up of proteins and an “envelope” that separates the nucleus from the cytoplasm. a folded membrane that moves materials around the cell. of protein synthesis. stacks of membrane-covered sacs that package and move proteins to the outside of the cell. where food molecules are broken down a d energy is released for the cell. -filled storage areas in cells. 13.what structures are found in plant cells that are not found in animal cells? what are these structures used for?